Stock-Based Compensation Plans (Narrative) (Details) (USD $)	3 Months Ended			3 Months Ended			12 Months Ended	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2014 Employee Stock Option Plan [Member]	Feb. 28, 2014 Employee Stock Option Plan [Member]	Mar. 31, 2014 Employee Stock Option Plan [Member] Minimum	Mar. 31, 2014 Employee Stock Option Plan [Member] Maximum	Mar. 31, 2014 Non-Employee Director Stock Option Plan [Member]	Dec. 31, 2013 Employee Stock Purchase Plan [Member]	Mar. 31, 2014 Restricted Stock Plan [Member]	Mar. 31, 2014 Equity Incentive Plans [Member] plan	Mar. 31, 2014 Stock Options [Member] plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of plans (in plans)									4	2
Compensation expense for share-based payments	$ 4,009,346
Compensation cost capitalized as part of inventory	239,959
Number if shares available for grant (in shares)			12,000,000
Option vesting period				1 year	5 years	6 months
Option expiration period				2 years	7 years	10 years
Unrecognized compensation cost		25,136,376				0
Options granted (in shares)						84,000
Shares approved (in shares)							1,000,000
ESPP discount rate							85.00%
ESPP discount rate recognized as compensation expense							15.00%
Options granted (in shares)								2,000,000
Restricted period, maximum, in years								10 years
Unearned stock-based compensation								9,808,075
Amortization expense								$ 732,734